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Windows 7: i can't boot if i do not put the dvd. help!

i installed windows 7 to my laptop. it worked fine. everything is doing great.

however, when i shut it down and restart my laptop. there is a message that "operating system not found". i can't boot it.
i tried to insert the dvd installer, and there it goes, i was able to boot windows 7.
how can i boot windows 7 without the dvd?
is this really the thing with windows 7? does it really need the dvd for it to start up?

I had this same problem and it took some time to find out that in my laptop I can install 2 drives. I changed the hard drive from one box to the other and it boots without the DVD.
Please take a look at the back of your laptop and see whether you can chaneg the position of the hard drive.

Try booting from the DVD and performing a Startup Repair. The position of your hard drive should not matter. You do not have a boot loader installed, for whatever reason, and that's what's causing the problems.

BTW, I would not recommend messing with the internals of your computer if you do not know what you are doing.

i did the start-up repair already, two times. still i can't get to boot without the dvd.
the message still appears "operationg system not found.
regarding the boot loader, how do i check if that's installed? so that i know if that's the root of this problem.

i can't boot if i do not put the dvd. help!

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